Fmoc-Cys(tBu)-OH CAS 67436-13-9

Purity >95%In StockPharmaceutical Standards
CAS No.67436-13-9
Molecular FormulaC22H25NO4S
Molecular Weight399.50 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Fmoc-Cys(tBu)-OH CAS 67436-13-9 chemical structure

Description

Fmoc-Cys(tBu)-OH (CAS 67436-13-9) is a high-purity analytical reference standard with the molecular formula C22H25NO4S and a molecular weight of 399.50 g/mol.

Fmoc-Cys(tBu)-OH (C22H25NO4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

As a certified reference material (CRM), Fmoc-Cys(tBu)-OH meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC22H25NO4S
Molecular Weight399.50 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)11.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1976
Nitrogen Atoms1
Sulfur Atoms1

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